Sewing machine



May 14, 1929. J. H. RICHARDSON SEWING MACHINE Filed Nov. 3, 1923 fizz/6x169?" 27: W 2 4 MM W2? Patented May 14, 1929.

uurrso STATES,

PATENT OFFICE.

JOHN H. nrcnAnnsou, or WAKEFIELD, MASSACHUSETTS, ASSIGNOR TO UNITED SHOE MACHINERY CORPORATION, on PATERSONQNEW :rnRsnY, A CORPORATION OF NEW' JERSEY.

SEW IN G MACHINE.

Application filed November 3, 1923. Serial NO. 672,665.

The invention relates to solo sewing inachines of the McKay type in which the shoe is supported on a rotatable horn located. with in the shoe and carrying a. rotary whirl which places the thread in the hook of the needle after the needle has passed through the sole and entered the needle hole in the tip of the horn.

To permit the seam to be properly located in the channel which is close to the edge of the shoe sole, the tip of the horn has heretofore been substantially concentric with the needle hole, its projection from the needle hole being practically the same at the end as at the sides and being as small as permitted. by the size of the whirl and the necessary support and protection therefor. When a horn of this construction swung into a position in which the shoe is fed onto the horn, the presser foot of the machine bears against the work beyond the end of the horn and tends to bend the work down slightly. While this is not seriously objectionable in sewing C0111- paratively heavy shoes having comparatively heavy and stiff inner soles, it becomes so in sewing certain classes of light work such, for instance, as ladies pumps which have light and flexible Outer and inner soles. In sewing this class of work, the pressure of the presser foot bonds the work downward slightly beyond. the end of the horn and it is fed up onto the end of the horn there is a tendency for a wrinkle Or wave to be formed in the insole. This wave or wrinkle is liable to increase until it obstructs the forward feed of the shoe and causes the insole to slide laterally off of the horn, running the seam off the edge of the solo.

The present invention avoids the Objection outlined above by the provision of a horn tip which projects from the needle hole to a materially greater distance at the end than at the sides and forms a support for the work under the presser foot as the work is fed onto theend of the horn. For the most eiticiont action the surface Of the tip should slope downwardly from the needle hole in both directions so that the action on the insole is the same in feeding onto Or feeding olf of the end of the horn, and wrinkling or buckling of the insole .is avoided, To facilitate swinging of the shoe in the shank, the side edges of the horn should also converge toward the end of the tip.

The invention is illustrated in the accompanying drawings in which Figure 1 is a front elevation of a McKay sewing machine embodying the invention; Figure 2 is a full size detail of the horn tip; Figure 3 is a plan view; and Figure f is a section on line es of Figure 3.

The machine shown in the drawings is provided with a straight hook needle 2, a presscr foot 4:, and a feed point 6 which have the same construction and are actuated by the same mechanisms shown and described in Patent No. 1,412,423, dated April 11, 1922.-

In the embodiment of the invention shown, the born 8 of the machine is provided with a horn tip comprising the whirl receiving block 10 and the cap piece 12. The block is recessed to receive the usual whirl l-l which is rotated by the shaft 16 in. the usual ntranner. The under side of the cap piece 12 is recessed to fit over the whirl and is also provided with the needle hole 18. The distance from the end of the cap piece to the needle hole is materially greater than the distance from the side edges of the cap piece to the needle hole so that when the horn is in. position for the shoe to feed onto the end of the horn, as indicated in Figure l, the tip of the horn forms a support for the shoe which underlies the presser foot t and prevents downward bending of the insole by the presser foot. The upper surface of the cap which directly engages and supports the insole slopes dowmvardly from the needle hole in both directions so that the action of the horn tip on the insole is the same in feeding onto the end of the horn as in feeding oil of the end of the horn and wrinkling Or buckling of the insole when feeding Onto the end of the horn is avoided. As shown in Figure 3, the side edges Of the cap plate are inclined so that they converge toward the extremity of the tip and do not interfere with the swinging ofthe shoe when sewing in the shank. The projecting end of the horn tip thus affords an adequate support for thin and flexible insoles and avoids the objectionable wrinkling or buckling thereof when sewing this class of work. Since the usual practice in sewing this class of work is to stop the machine after sewing up to the toe along One side of the shoe, then to ire-position the shoe on the horn and sew from the toe along the other side of the shoe, the projecting tip of the horn does not interfere with the usual manipulation of the shoe in sewing the seam.

What is claimed is:

i 1. A work supporting horn for shoe sewing machines having in its tip a whirl receiv-' ing recess and a needle hole and having a work supporting surface, the forward projection of which from the needle hole to its 7 end is materially greater than the lateral projection from the needle hole to its side edges.

2. A work supporting horn for shoe sewing machines having in its tip a whirl receiving recess and'a needle hole, and having the lateral projection from the needle hole 20 to its side edges.

JOHN H. RICHARDSON. 

